If you still want to attempt 3.51.01, ensure you have a backup of your current firmware (unlikely possible on this model) and accept the risk of failed downgrade.
Once the progress bar reaches 100%, the TV will notify you and usually to apply the changes. Troubleshooting Tips How to update any LG television using a USB drive? lcd tv lg firmware 32lg3000 v35101 updated install
: The specific version v3.51.01 (typically a .bin or .epk file) downloaded from an official LG support page like LG UK Support or LG Russia Support . Step-by-Step Installation Guide If you still want to attempt 3
In this detailed guide, we will cover everything you need to know about the —what it fixes, how to download it safely, and a step-by-step installation guide. : The specific version v3
If the TV doesn't detect the USB, ensure the folder is named correctly ( LG_DTV ) and that the file is not still zipped.
Do not turn off the TV, unplug it, or remove the USB drive while the progress bar is loading.